<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix ="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix ="fmt" %>

<form action="ServletUsers" method="get">
    Login : <input type="text" name="login"/><br>
    <input type="hidden" name="action" value="deleteUser"/>
    <input type="submit" value="Supprimer" name="submit"/>
</form>